Overgear transmission



Oct. 25, 1932.

R. BERINGER ET Al. 1,333,859

OVERGEAR TRANSMISSION Filed Deo. 27, 1926 n VER 6 EHR les v525;

@gwn W gm` Patented oct. 2s, `1932 Laaste g -,UNiTEDa-sTATss PATENT OFFICE l iarisocin` nanmenn Aivnnnnns'r W. .snAnoLivn or DETROIT, MICHIGAN, AssiGnoRs To GENERAL MOTORS CORPORATION, lorA DETROIT, MICHIGAN, A CORPORATION 4or n OVGEAR TRANSMISSION Applpiafvig fura` n e'cniber 27, 192e. sergiaino. 157,193. p A

This invention relates to gearing' and is more particularly concerned with an im- A provement in vehicle power transmission' Among theobjeots of the'invention are to aiford added exibility, to permit the use of a more advantageous ratio betweenv the driving pinion and the ringk gear at the rear axle,

o toseeurea quietftransmission 'not only when running in high but also in'thirdV speed and in second speed. The invention also makes use of aoomparatively'short oonntershaft and a ,reduced distancek between theeentres `of *the aligned shafts and they Countershaft. K g

` For theattainment of theabove and" other obj ects the structure belOw'ha's-been designed; f Accompanying fthe following" description isa drawingillustratinga single embodiment ofthe invention. I'

"In the drawing; 1 v

Figure 1 is a longitudinal vertical section of my improved transmission;

Figure 2 is ahorizofntal section yon the line 2 2 of Figure 1; f

Figure Slis anendelevation'of partswithin the transmissionfhousing.

Referring by reference severalgligures of the drawing,y the transmis- :siony housingis designated by numeral y5." 4It Y is provided' with end'walls7'and9 anda Cover member lllffyEndY wall 7 extends inwardly as' at 13 and engages an inner oiroularprojection 151 of the easing y'and is yheld, in position by fastening-means Y117'.A Within the extension'l is an outer race' 19 'for bearings 21, the latter providing'an anti-'friction mounting for shaft 23', Vthis 'shaft being the clutchV driven shaft` Inwardlylof bearing'21 race V19' l'is/.formed as ashelf or wall 251 of are shapefthisiwall Y'sfervingvggV as ifa 'i guide for a correspondingly shaped part 27 of a fork 29"(Sarried` by 'rod 31j;

GlutchV shaft 23' is 'enlarged'fatz itsfinner endv whereit is 'formed witli'radial teethoonsti#4 tuting an* external gear 33, and with axial teeth tov constitutea lClutch Yele1n`ent'35. Y I

Y Shaft'37 is theidrivingv shaft,5 or spline shaft. Itis reducediat its A'forward 'end where lit ispiloted within the' enlargedend of shafty 23 bearingsf39 being.y used 'as shown. This spline shaft; at its rearyend,i isr mounted. with# in anti-frietionbearings, as'at 38 inthe rear oharacters'to the housing wall 9. Outside the bearings 38 there may be .a supplemental cover 43l housing a gear 45'for driving a speedometer drive shaft, not shown.

The gear housing has an intermediate partition 47 having an opening eccentric with reference to the'aligned shafts 23 and` Within this Opening isa bearing 49 having an outer race 51. Conoentrio with reference o to the bearing 49 the extension 13 of end wall 7 has a bearing 52 and an Outer race 54. Journalled in bearings 49 and 52'is a gear eage'orv ring formed by vsecuring together two mem-Y v V62 within bearing y52. Cage member l.55 has an internal` gear 63 and Cage member 575 hasV an internal gear 65. VSlidable on the spline shaft within the cage is a clutchv gear member 67 having a collar'69 engaged `by the portion 27 of fork 29 as shown.V The clutch gearmember. is in the form vof a spur gear with axial clutch teeth 71. t Y

Beneath the aligned shafts is a Countersha-ft 7 journalledinthe easing This shaft has a spur gear 75 engaging external gearhand itialso is providedwith spur gears-77 and 79.

An idler gear,not shown,V is mounted in the Oasingand is in constant driving engagement withgear77. o V y y Onlthe spline shaft -is agear 81 having. a collar 83 engaged by a fork 85 extendingffrom' a sliding rod 87. This' gear `iswhen in neu-l tral, positioned out of engagement with gear 79 and also out of engagement with .the idler but it .may be selectively moved to engage eitherfof said gears. Also slidable on'the spline shaft is a gear 89having-a collar-91 engaged by fork 93 carried by a third sliding-v rodk95. Gear'SQ has internalteethto engage,

s when in Operativepositiom'th'e end portion of v gear 61v of they eocentrioally mounted cage- A lock of sitabletype is shown at 101. It consists of a ball 103 which when unlockedl mayl move against the tension ofthe spring 105.v l` Y Y y 1 y' A vConventional interlocky for use with the Y "rotate the driven shaft at two different speed n ratios with'reference to the driving shaft both in the same direction, and means to selectably operate-said gear trains.

4. The invention defined by claim 3, said external-internal gearltrain's' each including a member slidable" on the driven vshaft for makingrand breaking the drive between the eccentric ringand the driven shaft.

5. The invention defined in claim 3, said external-internal gear trains each includingV a member slidable on the driven shaft, one

of said slidable members including a part to directly clutch said driving kshaft and driven shaft.

6. A transmission for vehicles, comprisv ing driving and driven shafts, an eccentrically positioned ring around said shafts, gear-` ing between said driving shaft and said ring,

an external gear 'ont said ring, an internal l gear on said driven shaft slidable into engagement with said yexternal ring gear, a

eountershaft, a gear thereon in'constant engagementl withA said-external ring gear and additional gearing between the countershaft and the driven shaft. l

7. A transmission for vehicles, comprising driving'and driven shafts, an eccentrically positioned' ring around said shafts, gearingy between said driving shaft and said ring, an

Y external 'ear on'said ring, an internal gear on said riven shaft slidable Ainto engagement with saidexternal ring gear, an internal gear on said ring, an external clutch gear slidable on said shaft to engage said internal gear or toV clutchsaidV driven shaftto said driving shaft. n In testimony whereof we an'ix our signatures. 4 n

yROSCOE' BERINGER. kE.V W. SEAHOLM. f 

